CN107813532A - A kind of large hydraulic press crossbeam levelling device - Google Patents
A kind of large hydraulic press crossbeam levelling device Download PDFInfo
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- CN107813532A CN107813532A CN201710818433.1A CN201710818433A CN107813532A CN 107813532 A CN107813532 A CN 107813532A CN 201710818433 A CN201710818433 A CN 201710818433A CN 107813532 A CN107813532 A CN 107813532A
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- hydraulic cylinder
- valve port
- crossbeam
- cylinder
- stepper motor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
- B30B15/0052—Details of, or accessories for, presses; Auxiliary measures in connection with pressing for fluid driven presses
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
- B30B15/26—Programme control arrangements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
- F15B11/22—Synchronisation of the movement of two or more servomotors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/06—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with two or more servomotors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/1404—Characterised by the construction of the motor unit of the straight-cylinder type in clusters, e.g. multiple cylinders in one block
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/1423—Component parts; Constructional details
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/20—Other details, e.g. assembly with regulating devices
- F15B15/202—Externally-operated valves mounted in or on the actuator
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B19/00—Testing; Calibrating; Fault detection or monitoring; Simulation or modelling of fluid-pressure systems or apparatus not otherwise provided for
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/08—Servomotor systems incorporating electrically operated control means
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Fluid-Pressure Circuits (AREA)
- Actuator (AREA)
Abstract
The present invention relates to a kind of large hydraulic mechanism, and in particular to a kind of large hydraulic press crossbeam levelling device.A kind of large hydraulic press crossbeam levelling device, 4 hydro -leveling devices are connected including crossbeam and with the crossbeam lower surface, 4 hydro -leveling devices are separately positioned at four angles of crossbeam, the hydro -leveling device includes the stepping cylinder for the plunger case of coarse adjustment and for fine setting, and the bottom of the stepping cylinder is fixedly connected with the top of plunger case.The application proposes a kind of large hydraulic press crossbeam levelling device, and the gentle fine setting of coarse adjustment that can complete hydraulic press crossbeam is put down, and is improved the leveling precision of hydraulic press crossbeam, is widened the application field of hydraulic leveling technology.
Description
Technical field
The present invention relates to a kind of large hydraulic mechanism, and in particular to a kind of large hydraulic press crossbeam levelling device.
Background technology
Large-scale overall isothermal die forging process part needs large hydraulic to machine, and large hydraulic press requires that multi-cylinder is coordinated to contribute simultaneously,
The mechanical structure that multi-cylinder synchronous is accurately run.But due to workpiece material it is uneven and be asymmetrical in shape, the manufacture of hydraulic cylinder, peace
The factors such as dress precision cause hydraulic press crossbeam to tilt, so as to influence the quality of workpiece and reduce the life-span of hydraulic press.Therefore have very much
The necessary horizontal gird motion to hydraulic press synchronizes control.But the crossbeam of current hydraulic press is mostly multi-cylinder block form driving liquid
Press, crossbeam move under the Driven by Hydraulic Cylinder on diverse location along column, and being synchronized with the movement for crossbeam passes through when hydraulic press pushes
Piston cylinder and flow divider or mechanical synchronization control, and crossbeam is in course of adjustment and occurred that this mode was complicated partially,
The requirement of the piston cylinder accuracy of manufacture is high, is not provided with secondary fine setting puts down, and the horizontal control accuracy of crossbeam is not high.
Application No. CN201710073327.5 China's application discloses a kind of high dynamic compensation volume synchronization leveling system
System and its application, control method, specifically disclose a kind of leveling system, including leveling subsystem and volume synchronization subsystem, adopt
With the mode of four-corner leveling, leveling subsystem has four groups, is arranged at the dead angle of press base, and leveling subsystem includes piston
Formula leveling cylinder, small latus rectum proportional servo valve, displacement transducer, constant pressure oil source, low pressure oil sources；Volume synchronization subsystem includes waiting directly
Footpath volume synchronization plunger case, common motion plate, return component.But the machine of specific device in leveling system is not provided in this application
Tool annexation, and the motion between piston type leveling cylinder and plunger case is to be mutually related, the scope so adjusted is smaller, no
It can realize that the gentle fine setting of coarse adjustment is flat simultaneously, reduce leveling precision.
The content of the invention
Though in order to solve leveling system of the prior art using four-corner leveling, can not the gentle fine setting of coarse adjustment simultaneously it is flat
Problem, the application propose a kind of large hydraulic press crossbeam levelling device, and the gentle fine setting of coarse adjustment that can complete hydraulic press crossbeam is put down,
The leveling precision of hydraulic press crossbeam is improved, widens the application field of hydraulic leveling technology.Technical scheme is as follows：
A kind of large hydraulic press crossbeam levelling device, including crossbeam and it is connected 4 hydraulic levelings with the crossbeam lower surface
Device, 4 hydro -leveling devices are separately positioned at four angles of crossbeam, and the hydro -leveling device includes being used for coarse adjustment
Plunger case and stepping cylinder for fine setting, the bottom of the stepping cylinder is fixedly connected with the top of plunger case.It is logical
Above-mentioned setting is crossed, it is convenient that four angles of crossbeam are adjusted respectively by four hydro -leveling devices, and when required adjustment
When altitude range is larger, it is adjusted using plunger case, when the altitude range of required adjustment is smaller, is entered using stepping cylinder
Row regulation, two regulation processes are not interfere with each other, so convenient that beam height is accurately adjusted, and reach required height
Degree.
Further, the stepping cylinder include hydraulic cylinder body, be arranged in hydraulic cylinder body hydraulic cylinder piston,
The valve core device of stepper motor and step motor control, pressure oil-in one, the hydraulic pressure are provided with the hydraulic cylinder body
Cylinder piston includes leaving the upper piston in gap with hydraulic cylinder body medial surface and being in contact down with hydraulic cylinder body medial surface
Portion's piston, the top of the upper piston and the lower surface of crossbeam connect, and hydraulic cylinder intracoelomic cavity is divided into by the lower piston
The A chambers on top and the B chambers of bottom, the dynamic duct of voltage supply power oil stream, the hydraulic cylinder piston are provided with the hydraulic cylinder piston
The cavity for accommodating valve core device and bottom opening is inside provided with, the lower end of the valve core device is connected with stepper motor, pressure
Power oil enters A chambers by the pressure oil-in one, and pressure oil enters B chambers and fuel tank by the duct.
, can be by the control to stepper motor by the reasonable setting to stepping cylinder, and then valve core device is controlled,
Form differential connection so that hydraulic cylinder piston the moving up and down in hydraulic cylinder body in hydraulic cylinder.
Further, the valve core device includes trapezoidal screw, and the lower end of the trapezoidal screw is connected with stepper motor, institute
State hydraulic cylinder piston be provided with the first duct for being used to connect A chambers and trapezoidal screw with for connecting the of fuel tank and trapezoidal screw
Two ducts, the 3rd duct, first duct and trapezoidal screw contact position are the first valve port, second duct and trapezoidal screw
Contact position is the second valve port, and when stepper motor does not drive trapezoidal screw to rotate, first valve port and the second valve port are corresponding
At the big footpath of trapezoidal screw, first valve port and the second valve port are closed；When stepper motor drive trapezoidal screw rotation, screw thread to
When upper mobile, the first valve port corresponds to screw channel position, and the first valve port is opened, and the second valve port corresponds to the big path position of screw rod, and second
Valve port is closed；When stepper motor drives trapezoidal screw rotation, when screw thread moves down, the first valve port corresponds to the big path position of screw rod,
First valve port is closed, and the second valve port corresponds to screw channel position, and the second valve port is opened.
Further, the minimum point of first valve port and the peak of any one screw thread screw channel are in same horizontal line
On, the minimum point of second valve port and the minimum point of any one screw thread screw channel are in the same horizontal line.
By setting the corresponding relation of valve port and trapezoidal screw, drive screw rod to rotate by stepper motor, choose on screw thread
Certain point on the basis of point, as the point rotates up, deviation, the first valve port and trapezoidal screw are produced between valve port and trapezoidal screw
Screw channel is corresponding, and the first valve port is opened, and the second valve port is corresponding with the big footpath of trapezoidal screw, and the second valve port is closed, and pressure oil passes through from A chambers
First duct, the first valve port enter screw channel, and B chambers are entered by screw channel, and B cavity areas are more than A cavity areas, are formed
Differential connection, promote hydraulic cylinder piston to move upwards, attempt to eliminate deviation；When stepper motor persistently drives trapezoidal screw to up-regulation
When saving height, trapezoidal screw constantly opens the first valve port, and motion is constantly trying to close the first valve hydraulic cylinder piston upwards
Mouthful, the second valve port remains turned-off in whole process, so repeats this process, and hydraulic cylinder piston is from motion tracking trapezoidal screw screw thread
Tip position, until stepper motor stops driving trapezoidal screw to move upwards, hydraulic cylinder piston moves to actually required position；
Such as the point is rotated down, and deviation is produced between valve port and trapezoidal screw, then the first valve port is corresponding with the big footpath of trapezoidal screw, and first
Valve port is closed, and the second valve port is corresponding with trapezoidal screw screw channel, and the second valve port opening, pressure oil passes through screw thread screw channel, the from B chambers
Two valve ports, the second duct and the 3rd duct return to fuel tank, and hydraulic cylinder piston moves downward, and attempt to eliminate deviation, work as stepper motor
When persistently drive trapezoidal screw adjusts downwards height, trapezoidal screw constantly opens the second valve port, and hydraulic cylinder piston moves downward
Continuously attempt to close the second valve port, the first valve port remains turned-off in whole process, so repeats this process, hydraulic cylinder piston is certainly
Motion tracking trapezoidal screw threaded top position, until stepper motor stops driving trapezoidal screw to move downward, hydraulic cylinder piston fortune
Move actually required position.By controlling the direction of rotation of stepper motor can be to control the up and down motion of piston, and then adjust
Horizontal depth of beam is saved, the control method is convenient to be operated, and control accuracy is high.
Further, the hydraulic cylinder body includes hydraulic cylinder cylinder, is arranged on the hydraulic cylinder of hydraulic cylinder cylinder upper end
The hydraulic cylinder flange of hydraulic cylinder cylinder lower end is covered and is arranged on, hydraulic cylinder cylinder cap and crossbeam are stretched out in the top of the hydraulic cylinder piston
Lower surface connects, and the lower end of the valve core device passes through hydraulic cylinder flange, by the output axis connection of shaft coupling and stepper motor,
Stepper motor sleeve is additionally provided with the stepper motor.
By the structure for rationally setting stepping cylinder so that stepper motor stably drives trapezoidal screw to rotate, and then
Adjust horizontal depth of beam.
Further, the levelling device also includes PLC control system, and the PLC control system passes including pattern displacement
Sensor and PLC, simultaneously output pulse signal gives PLC to control for the grating displacement sensor detection cornerwise displacement of crossbeam
Device, the PLC return pulse signal, offset deviation and output control signal is calculated gives stepping electricity by comparing
Machine.Two hydro -leveling devices on the same diagonal of crossbeam are set as one group, when there is deviation, pattern displacement passes
Sensor detects the cornerwise displacement of crossbeam, and output pulse signal adjusts same diagonal to PLC by PLC
On sustained height, until two diagonal are adjusted on sustained height.
Further, the plunger case includes plunger cylinder, the plunger and plunger case liquid being arranged in plunger cylinder
Pressure system, the upper end of the plunger are connected with stepping cylinder by stepper motor sleeve flange, are provided with and are used in the plunger
The cavity of stepper motor is accommodated, pressure oil-in two is set in the plunger cylinder.
Further, the plunger case hydraulic system includes check valve and choke valve, and the choke valve and check valve are in parallel
Connected after setting with pressure oil-in two.
By rationally setting the structure of plunger case, coarse adjustment is carried out by plunger case HYDRAULIC CONTROL SYSTEM plunger case, reaches institute
The adjustment effect needed.
The technique effect that can reach of the present invention is：
1. the levelling device of the present invention can carry out coarse adjustment by plunger case, is finely adjusted by stepping cylinder, simultaneously
Coarse adjustment and fine setting are realized, improves the leveling precision of hydraulic cylinder crossbeam；
2. rationally setting the structure of stepping cylinder, controlled by the relative position of the valve port on trapezoidal screw and hydraulic cylinder
The flowing of pressing pressure oil, it is simple in construction, without setting control device in addition, by controlling the direction of rotation of stepper motor i.e. controllable
The lifting of hydraulic cylinder piston processed, it is simple to operate, and control accuracy is high；
3. by the way that stepper motor is arranged in the cavity in plunger cylinder plug, the upper end of plunger, stepper motor sleeve and
Hydraulic cylinder flange three is fixedly connected, and effectively saves space so that the connection between plunger case and stepping cylinder more fastens；
4. by setting PLC control system, the diagonal displacement of the lines of crossbeam is monitored in real time, and control the tune of stepper motor
Whole offset deviation, it further increasing leveling precision.
Brief description of the drawings
Fig. 1 is the structural representation of the hydro -leveling device of the present invention；
Fig. 2 is the enlarged drawing in C portions in Fig. 1；
In figure：1- crossbeams；2- stepping cylinders；21- hydraulic cylinder bodies；211- pressure oil-in one；212- hydraulic cylinders
Body；213- hydraulic cylinder cylinder caps；214- hydraulic cylinder flanges；22- hydraulic cylinder pistons；The ducts of 221- first；The valve ports of 222- first；223-
Second duct；The ducts of 224- the 3rd；The valve ports of 225- second；23- stepper motors；231- stepper motor sleeves；24- valve core devices；
The big footpaths of 241-；242- screw channels；25- shaft couplings；3- plunger cases；31- plunger cylinders；311- pressure oil-in two；32- posts
Plug.
Embodiment
Particular content of the invention is specifically described with reference to Figure of description.
Referring to Fig. 1-2, a kind of large hydraulic press crossbeam levelling device, including crossbeam 1 and be connected with the lower surface of crossbeam 1
4 hydro -leveling devices, 4 hydro -leveling devices are separately positioned at four angles of the lower end of crossbeam 1, each hydraulic leveling dress
Putting includes a stepping cylinder 2 and a plunger case 3, and the stepping cylinder 2 is used to be finely adjusted crossbeam, the post
Plug cylinder 3 is used to carry out coarse adjustment to crossbeam, and the stepping cylinder 2 is arranged on the top of plunger case 3, the stepping cylinder 2
Bottom is fixedly connected with the top of plunger case 3.
The stepping cylinder 2 includes hydraulic cylinder body 21, the hydraulic cylinder piston 22 being arranged in hydraulic cylinder body 21, step
The valve core device 24 that stepper motor 23 and stepper motor 23 control, the hydraulic cylinder body 21 include hydraulic cylinder cylinder 212, are arranged on
The hydraulic cylinder cylinder cap 213 of the upper end of hydraulic cylinder cylinder 212 and the hydraulic cylinder flange 214 for being arranged on the lower end of hydraulic cylinder cylinder 212.It is described
Pressure oil-in 1 is provided with hydraulic cylinder body 21, it is preferable that the pressure oil-in 1 is arranged on hydraulic cylinder
Close to the position of hydraulic cylinder cylinder cap 213, the hydraulic cylinder piston 22 is included between leaving with hydraulic cylinder body medial surface the upper end of body 212
The upper piston of gap and the lower piston being in contact with hydraulic cylinder body medial surface, the upper piston stretch out hydraulic cylinder cylinder cap
213 are connected with the lower surface of crossbeam 1, and preferably be hinged, the external diameter of the lower piston is mutually fitted with the internal diameter of hydraulic cylinder cylinder 212
Should, the inner chamber of hydraulic cylinder body 21 is divided into the A chambers on top and the B chambers of bottom by the lower piston, and the lower piston can be along liquid
Cylinder pressure cylinder 212 moves up and down.Preferably, the upper piston and the lower piston are cylindric.The hydraulic cylinder is lived
The dynamic duct of voltage supply power oil stream is provided with plug 22, specifically includes the first duct 221 of connection A chambers and valve core device 24, connection
Valve core device 24 and the second duct 223 of fuel tank and the 3rd duct 224, second duct 223 connect with the 3rd duct 224,
First duct 221 is the first valve port 222, second duct 223 and trapezoidal screw contact position with trapezoidal screw contact position
For the second valve port 225.
The valve core device 24 is specially trapezoidal screw, the thread cross-section of the trapezoidal screw be it is trapezoidal, it is described trapezoidal
The lower end of screw rod passes through hydraulic cylinder flange 214, passes through the output axis connection of shaft coupling 25 and stepper motor 23, the band of stepper motor 23
Dynamic trapezoidal screw rotates, and the minimum point of the first valve port 222 is with the peak of any one screw channel 242 in same horizontal line
On, the peak of the second valve port 225 and the minimum point of any one screw channel 242 in the same horizontal line, the trapezoidal spiral shell
The vertical height in the big footpath 241 of bar is more than the vertical height of the first valve port 222 and the second valve port 225, preferably the first valve port 222
Identical with the vertical height of the second valve port 225, the vertical height in big footpath 241 is vertical for the first valve port 222 and the second valve port 225
Height sum.
When stepper motor 23 does not drive trapezoidal screw to rotate, the first valve port 222 and the second valve port 225 correspond to trapezoidal spiral shell
The position of big footpath 241 of bar, two valve ports are turned off；When stepper motor 23 drives trapezoidal screw rotation, when screw thread moves up, valve
Mouthful deviation being produced between trapezoidal screw, the first valve port 222 is opened, and the second valve port 225 still corresponds to the big position of footpath 241, and second
Valve port 225 is closed, and now passes through the first duct 221, the first valve by the pressure oil that pressure oil-in 1 is entered in A chambers
Mouth 222 enters screw thread screw channel 242, and B chambers are entered along screw thread screw channel 242, because the area of B chambers is more than the area of A chambers, shape
Into differential connection, B cavity pressures oil promotes hydraulic cylinder piston 22 and crossbeam 1 to move upwards, it is intended to deviation is eliminated, when stepper motor 23
Trapezoidal screw is persistently driven when being adjusted up height, trapezoidal screw constantly opens the first valve port 222, and hydraulic cylinder piston 22 to
Upper move is constantly trying to the first valve port 222 of closing, and the second valve port 225 corresponds to the big footpath of trapezoidal screw all the time in whole process
241 positions, are remained turned-off, and so repeat this process, and hydraulic cylinder piston 22 is from motion tracking trapezoidal screw threaded top position, directly
Stop driving trapezoidal screw to move upwards to stepper motor 23, hydraulic cylinder piston 22 moves to actually required position；Work as stepping
Motor 23 drives trapezoidal screw to rotate, and when screw thread moves down, deviation, the second valve port 225 are produced between valve port and trapezoidal screw
The corresponding position of screw channel 242, the second valve port 225 are opened, and the first valve port 222 still corresponds to the big position of footpath 241, the first valve port
222 close, and now the pressure oil in B chambers passes through screw channel 242, the second valve port 225, the second duct 223 and the 3rd duct 224
Fuel tank is returned to, hydraulic cylinder piston 22 moves downward, it is intended to deviation is eliminated, when stepper motor 23 persistently drives trapezoidal screw to downward
When saving height, trapezoidal screw constantly opens the second valve port 225, and hydraulic cylinder piston 22 moves downward and continuously attempts to close the second valve
Mouthfuls 225, the first valve port 222 corresponds to the position of big footpath 241 of trapezoidal screw all the time in whole process, remains turned-off, so repeats this
Individual process, hydraulic cylinder piston 22 is from motion tracking trapezoidal screw threaded top position, until stepper motor 23 stops driving trapezoidal spiral shell
Bar moves downward, and hydraulic cylinder piston 22 moves to actually required position.Preferably, when stepper motor rotates forward, trapezoidal spiral shell
The screw thread of bar moves upwards, and when stepper motor reversely rotates, the screw thread of trapezoidal screw moves downward.
Stepper motor sleeve 231 is additionally provided with the stepper motor 23.
The large hydraulic press crossbeam levelling device also includes PLC control system, the connection of the tunnel of PLC control system four, difference
4 hydro -leveling devices being correspondingly arranged at crossbeam corner, the PLC control system include grating displacement sensor and PLC
Controller, so that positioned at same cornerwise two hydro -leveling devices of crossbeam, as one group, 4 hydro -leveling devices are divided into two groups,
The grating displacement sensor detects the cornerwise displacement of crossbeam and output pulse signal is to PLC, the PLC
Return pulse signal, offset deviation and output control signal is calculated to stepper motor 23 by comparing, passes through stepper motor
Trapezoidal screw is driven to rotate, and then adjustment hydraulic cylinder piston 22 and crossbeam 1 are moved upwardly or downwardly.Corresponding under diagonal
One group of hydro -leveling device adjustment diagonal is in sustained height, until two diagonal finish in sustained height, adjustment.
The plunger case 3 includes plunger cylinder 31, the plunger 32 and plunger case hydraulic pressure being arranged in plunger cylinder 31
Plunger cylinder 31 is stretched out in system, the upper end of the plunger 32, and the upper end of the plunger 32 is provided with extension, the plunger 32
Upper end is connected with stepping cylinder by the flange of stepper motor sleeve 231, and the plunger 32 is provided with the use of upper end open along axis
In the cavity for accommodating stepper motor 23, the side wall bottom end of the plunger cylinder 31 is provided with what voltage supply power oil flowed in and out
Pressure oil-in 2 311.
The plunger case hydraulic system includes check valve and choke valve, and after check valve and the choke valve parallel connection, one end connects
Logical pressure oil-in 2 311, other end connection pressure oil.When needing upper adjusting height, during 3 oil-feed of plunger case, the pressure oil
From choke valve oil-feed, plunger 32 rises；When needing falling head, it is arranged under the active Hydraulic Cylinder crossbeam of crossbeam upper end
OK, plunger 32 declines, and plunger case 3 is fuel-displaced, and pressure oil flows out from check valve.4 choke valves have identical aperture.
In the detailed process of leveling is carried out to crossbeam, plunger case can be first passed through and carry out coarse adjustment, then pass through stepping again
Hydraulic cylinder is finely adjusted, and PLC control system monitors the diagonal displacement of the lines of crossbeam in real time, if leveling not yet, PLC is sent
Pulse is controlled to stepper motor, untill leveling.By way of coarse adjustment combines fine setting, the precision of crossbeam leveling is added.
Embodiments of the present invention are explained in detail above in conjunction with accompanying drawing, but the present invention is not limited to above-mentioned implementation
Mode, in those of ordinary skill in the art's possessed knowledge, the premise of spirit of the invention can also not departed from
Under make a variety of changes.
Claims (8)
1. a kind of large hydraulic press crossbeam levelling device, including crossbeam (1) and 4 liquid being connected with the crossbeam (1) lower surface
Levelling device is pressed, 4 hydro -leveling devices are separately positioned at four angles of crossbeam (1), it is characterised in that the hydraulic pressure
Levelling device includes the stepping cylinder (2) for the plunger case (3) of coarse adjustment and for fine setting, the stepping cylinder (2)
Bottom is fixedly connected with the top of plunger case (3).
2. large hydraulic press crossbeam levelling device as claimed in claim 1, it is characterised in that stepping cylinder (2) bag
Hydraulic cylinder piston (22), stepper motor (23) and the stepping electricity for include hydraulic cylinder body (21), being arranged in hydraulic cylinder body (21)
The valve core device (24) of machine (23) control, is provided with pressure oil-in one (211), the hydraulic pressure on the hydraulic cylinder body (21)
Cylinder piston (22) includes leaving the upper piston in gap with hydraulic cylinder body medial surface and being in contact with hydraulic cylinder body medial surface
Lower piston, the top of the upper piston is connected with the lower surface of crossbeam (1), and the lower piston is by hydraulic cylinder body
(21) inner chamber is divided into the A chambers on top and the B chambers of bottom, and the dynamic hole of voltage supply power oil stream is provided with the hydraulic cylinder piston (22)
Road, the interior cavity being provided with for accommodating valve core device (24) and bottom opening of the hydraulic cylinder piston (22), the valve element dress
The lower end for putting (24) is connected with stepper motor (23), and pressure oil enters A chambers, pressure by the pressure oil-in one (211)
Oil enters B chambers and fuel tank by the duct.
3. large hydraulic press crossbeam levelling device as claimed in claim 2, it is characterised in that the valve core device (24) includes
Trapezoidal screw, the lower end of the trapezoidal screw are connected with stepper motor (23), and the hydraulic cylinder piston (22), which is provided with, to be used to connect
Logical first duct (221) of the A chambers with trapezoidal screw and the second duct (223), the 3rd hole for connecting fuel tank and trapezoidal screw
Road (224), first duct (221) and trapezoidal screw contact position be the first valve port (222), second duct (223) and
Trapezoidal screw contact position is the second valve port (225), when stepper motor (23) does not drive trapezoidal screw to rotate, first valve port
(222) and the second valve port (225) corresponds to big footpath (241) place of trapezoidal screw, first valve port (222) and the second valve port
(225) close；When stepper motor (23) drives trapezoidal screw rotation, when screw thread moves up, the first valve port corresponds to screw channel
(242) position, the first valve port (222) are opened, and the second valve port corresponds to the big footpath of screw rod (241) position, and the second valve port (225) is closed；
When stepper motor (23) drives trapezoidal screw rotation, when screw thread moves down, the first valve port (222) is corresponding the big footpath of screw rod (241)
Position, the first valve port (222) are closed, and corresponding screw channel (242) position of the second valve port (225), the second valve port (225) is opened.
4. large hydraulic press crossbeam levelling device as claimed in claim 3, it is characterised in that first valve port (222)
The peak of minimum point and any one screw thread screw channel (242) in the same horizontal line, the minimum point of second valve port (225)
With the minimum point of any one screw thread screw channel (242) in the same horizontal line.
5. the large hydraulic press crossbeam levelling device as described in claim any one of 2-4, it is characterised in that the hydraulic cylinder
Body (21) includes hydraulic cylinder cylinder (212), is arranged on the hydraulic cylinder cylinder cap (213) of hydraulic cylinder cylinder (212) upper end and is arranged on
Hydraulic cylinder cylinder cap is stretched out at the hydraulic cylinder flange (214) of hydraulic cylinder cylinder (212) lower end, the top of the hydraulic cylinder piston (22)
(213) it is connected with crossbeam (1) lower surface, the lower end of the valve core device (24) passes through hydraulic cylinder flange (214), passes through shaft coupling
(25) with the output axis connection of stepper motor (23), stepper motor sleeve (231) is additionally provided with the stepper motor (23).
6. large hydraulic press crossbeam levelling device as claimed in claim 5, it is characterised in that the levelling device also includes
PLC control system, the PLC control system include grating displacement sensor and PLC, the grating displacement sensor inspection
Survey crossbeam (1) cornerwise displacement and output pulse signal is to PLC, the PLC return pulse signal, pass through
Compare and be calculated offset deviation and output control signal gives stepper motor (23).
7. large hydraulic press crossbeam levelling device as claimed in claim 6, it is characterised in that the plunger case (3) includes post
Plug cylinder cylinder body (31), the plunger (32) being arranged in plunger cylinder (31) and plunger case hydraulic system, the plunger (32)
Upper end is connected with stepping cylinder by stepper motor sleeve (231) flange, is provided with the plunger (32) and is used to accommodate stepping
The cavity of motor (23), pressure oil-in two (311) are set on the plunger cylinder (31).
8. large hydraulic press crossbeam levelling device as claimed in claim 7, it is characterised in that the plunger case hydraulic system bag
Check valve and choke valve are included, the choke valve and check valve connect after being arranged in parallel with pressure oil-in two (311).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710818433.1A CN107813532B (en) | 2017-09-12 | 2017-09-12 | A kind of large hydraulic press crossbeam levelling device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710818433.1A CN107813532B (en) | 2017-09-12 | 2017-09-12 | A kind of large hydraulic press crossbeam levelling device |
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| CN107813532A true CN107813532A (en) | 2018-03-20 |
| CN107813532B CN107813532B (en) | 2019-06-11 |
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| CN201710818433.1A Active CN107813532B (en) | 2017-09-12 | 2017-09-12 | A kind of large hydraulic press crossbeam levelling device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109624375A (en) * | 2018-12-26 | 2019-04-16 | 江苏徐工工程机械研究院有限公司 | Refuse disposal installation braced frame and refuse disposal installation |
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| Publication number | Publication date |
|---|---|
| CN107813532B (en) | 2019-06-11 |
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